Safety door lock



Aug. 5 1924.

1,503,820 G. DIETZ SAFETY DOOR LOCK Filed Oct. 19, 19 23 INVENTOR Gearye Did BY j A TTORNE Y Patented Aug. 5, 1924.

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'Ai i ih abjec o. n qy' e. a ee eek which is placed between the. door; a ndsthe sash-and is manipulated in sii clnmann er that the device to the'sash, anda thes on he ice ga e deer to p e nt h a t t pm be ng ere edvh l the device is in such position. a 7

These and other objects, will become apparent n. t escr p ion bel w, i whi h characters of refei ence. refer; to. lllge jnam ed parts oi the. drawing. Ris g r efly to. rawing, E g l fe 1 indieates a front-elevational Viewv oi. the Q QWQQ e lew at lat eiu e 2: satc ss.-s tien new aken line of E g ta-ly h w athe 9d;- ns aws i released, PQSitiQLL a gure s a o sec i na v ew' ken on line3+3 0t Eigure 2 andflshbws the lockis iaW- l g t y ex e ed and' neus able position; i

Figure 4 is-a cross-sectional view; thrua door," showing the method ot. locking} the doc inclosed position withthis device;-

E igure. 5 isa cross-sectional iew taken on,- line ofFigureL Eigure 6. is a perspective. view: ofone-Of e ck ns jaws.

Figure 7 is; an elevational View ofithe supe po t on at a doo and d r frame, showing the locking device: in position thereon.

Referring in detail to the drawing, the numeral 10 indicates the vertical frame posts inwhich a door 11 is pivotally mounted on hinges 12. This door is of the usual construction capableof a 90 degree swing and the posts 10 are provided with moulding strips 18 upon which the door shoulders when in closed position. The ordinary door construction usually has a space 14 between the upper edge of the door and the upper frame 15, and a similar space 16 between the frame post 10 and the outer edge of the door, Thedevice. being. mentioned in this escription is. adapted" to be. inserted into t ese spaces for. locking. the. doorfin closed statio h lad es de ce s nti l consists of. aflpa r oi side frame bars 17 connected at their. upper ends by a similar ban 1am 3 bar 9-" n ee o r end df the. side bans] 17;, these bars. forming. a rectangle. The. side, bars. 17 are provided W t roje t ietp ch Pa s u t bars 18; aridlt), and are-peened-over to. secure the last-nai'ned bars-rigidly tofmembers 17L The lower. barf'l9, is. provided with a curved "surface'Ql which has its high point atthe. rea qedge andextends curvedly downwa y o hatmn t me oi e 9: Th side; bars are, provided with vertical V- grooves-22 in which; the ends 23.- of acarriage 24;-aresilidably. mounted; This. carriage has an. car 23,? intermediate its, length and from which a threaded shaft 251:? extends downwardly thru an opening in thelower. bar 19 and projectsrsomewhat from said bar. A wing nut 25 engages the threaded end 24 oi; the shaft, and the shank 26 of'the wing nut ha a recessed annular channel formed thereon inwhich'the ends. of stay brackets 28 'are. engaged, said brackets being-rigidly secured to the barf19; A pair. of swing jaws 29, and 30 are used with the device and are provided with a pair of teeth 31 which project from their lower edge and are. curved so. as to ride upon the curved surface 21. Thesej aws. are. provided withinutually ade jacent corners. and a cut-out portion, from the upper. ends. of which pins. 32 project, said pins being rotatably. engagedin openin gs.v in thesides. ofthe car 23*? A band envelopes. the frame in a horizontal plane near the upper ends; of the side bars 17,

,and'comprises, a relatively narrowportion 33;, the'sides of the band being of the same width, and the rear. portion 34 being of. a substantially greater width. The purpose for this: band will-he more. fully hereinafter described. In order to retain the door within the frame in closed position, a flange 35 projects from the side of the lower bar 19 and is adapted to be engageable with the side surface of the door 11.

In use, the device is inserted in either of the spaces 14 or 16, and at any position, it being obvious that the upper horizontal bar 18 enters the space first, and in such position that the flange 35 lies in contact with the surface of the door 11, as illustrated in Figures 4 and 7. When the device is invserted in either of said spaces, the locking jaws 29 and 80 are aligned with the surface of the side bars 17 and in theposition as.in-

V dicated in Figures 1, 2, and 8. By rotating carriage 24:to travel further downwardly,

2 the door, thus thus causing the j aws29 and 30 to be rotated thru agreater degreeof are about the pins 32,the rear portion 3401B the band serving as asupport for the carriage when the jaws are in completely or partially extended position. When in extended position, the jaws V will substantially assume the position as 7 shown in Figure 4. From this illustration,

it will be seen that the person on the outside of the door pushing the same will be prevented from opening said door, as the extending jaws 30 will be engaged in the door frame while the flange 35 will engage reventing the latter from being opened. 11 order to release the device from the locked position, the wing nut is rotated in an opposite direction and causes the shaft to lift the carriage 24:, thereby drawing the jaws out ofthedoor j amb, the front band 33 folding the jaws into the position shown in Figure 2 during this drawing operation, the wing nut being at all times held stationary position by the brackets 28.

I claim V 1. A device of the class, described comprising a rectangular frame, the sides of said frame having grooves therein, a car riage extending across said frame and engaged in said grooves, a threaded shaft rigid with said carriage, a wing nut engaging said shaft, said wing nut when rotated being adapted to lift or lower the carriage, the frame being insertable between a door and door frame, and means on said carriage for engaging said door frame.

2. Adevice of the class described comprising a rectangular frame, the sidesof reventin the o enin of said door when b b V V the jaws are extended. 7 V 7 3, A device of the class described comprisin a rectangular frame, the sides of said j rame having grooves facing each other, a carriage slidable'betweenthe sides ofsaid frame, a threaded shaft rigid with the carriage, a thumb nut engaging said shaft, jaws pivotally mounted on said carriage,

said frame' beinginsertable between the door and door frame, curved. teeth'on the lower end of said jaws, a'curved surface on the rectangular frame supporting the teeth-of said j'aws',.said wing nut when rofated-being adaptedto lower the carriage in the slides and cause the teeth "tofrotate downwardly on the curved surface of the frame, and means'on said frame for retaining. a door in closed position when the jaws are extended.

4. A device of the class described comprising a rectangular frame, the'sides of said frame" having grooves facing each other, a carriage slidable between the sides of said frame, a threaded shaft rigid with the carriage, a thumb nut engaging said shaft, jaws pivotally mounted on said carriage, said frame, being'ins-ertable between the door and door frame, curved teeth on the lower end of said jaws, a curved surface on' the rectangular frame supporting the teeth of said jaws, said wing nut when rotated being adapted to lower the carriage in the slides and cause the teeth to rotate downwardly on the curved surface of the frame, a flange extending fromthe lower portion ofthe rectangular frame and adapted to engage the side of the door, a band enveloping the frame forming a support for the carriage when the jaws are in extended 7 position, the front portionof the band providing means for folding the jaws into the frame when said jaws are extracted from the door frame. 1 V V In testimony whereof I' aflix my si nature. 7 GEORGE nfnrz. 

